We’re all taught that water is clear, so why does the ocean look so strikingly blue when we’re staring out at it? It turns ...

When the Sun is high in the sky, this is why the entire sky is blue. It appears a brighter blue the farther away from the Sun you look, because there's more atmosphere to see (and therefore more ...

The writer recalls very vividly the blue aspect of the sky as seen from the top of the San Francisco Mountains in Arizona, which have an altitude of 13,000 feet above the sea; and in an ascent of ...

"The blue wavelengths of light are scattered, similar to the scattering of blue light in the sky, but absorption is a much larger factor than scattering for the clear ocean water.

A rare type of lightning known as “red sprites” was seen in the sky over the Atlantic Ocean near South Jersey earlier this month, according to an astronomy expert from the area.